Boiler-furnace.



N0.'s14 ,9 49.- PATENT'EDY-MARH, 1906.

'B.F.EDGAR. BOILER FURNACE.

APPLICATION FILED OCT. 27. 1903.

' 2 SHEETS-SHEET 1.

- I I w M 5 No. 814,949; PATENTED MAR. 13, 1906.

' E. F. EDGAR. k

BOILER FURNACE.

APPLICATION FILED OCT. 27. 1903.

2 SHEETS-SHEET 2,

v UNITED STATES PATENT OFFICE To all whom it may concern:

Be it known that I, ELLIS F. EDGAR, a citi-r zen of theUnited States,and a resident of Woodbrid e, in the county of Middlesex and State ofnac'es, of which the following is a specification. Figure 1 is a frontelevation of a boiler, part in full and'part in section, embodying myinvention. Fi 2 is a detail of eight pockets.

' section view of one of the fire-bricks.

part-in section, embodying my invention.

with fire-brie liningremoved. Fig. is a i 4 is a back view of one of thefire-bricks, s W- ing dead-air space in same. Fig. .5 is a section viewof a red-brick casing, showing fireclay lining attached to the'same;Fig. 6, a frontelevation of a boiler, part in full and I had inview thefollowing-objects in designing this style of boiler-furnace, namely: anoutside casin constructed air-tight, having pockets on t i e furnaceside of the same for the reception of a fire-brick lining com-' posed ofa special brick or block made and arranged in such a manner that theexpansion and contraction of the same is provided for in every twelveinches each way, thereby preventing the bulging and crackingof theoutside casing, causing leaks for the admission of a1r.

' 1 is the outside casing; 2, projection from casing forming pocket 3',fire-brick lining; .4, pocket shown in Fig. 2 with fire-brick re-- moved5, threaded boss for securing anchorbolt; 6, anchor-bolt.

The outside casing 1v (shown in Fig. 1) is composed ofcast-iron, and theprojections 2, forming the ockets, I prefer to have cast on, as shown inig. 1, being cheaper and makes the casing stronger, although I mightattach the pocket to the casing in some other form..

The outside'casing 1 (shown in Fig. 5) is comosed preferably, ofred-clay bricks or blocks, but'might be made of cement or any suitablematerial capable of supportin the fire-brick linin 3, as it is intendedthat t 's'outside casing s all be protected from extreme heat bythe-'firc-brick lining 3, which iscomposed of a" s ecial-made brick orblock of a suitable firec ay mixture that will withstand the temperatureof the furnace and protect the outside iss in Fig. 1, an the fire-claylining 3 I would I =Speoification of Letters Patent. Application filedOctober 27,1903. SerialNo. 178,672-

ew Jersey, have invented certain, new and useful Improvements lIlBoiler-Fur- Batented march 13', 1,906)

make with a large percentage of sawdust or any'material that would beconsumed while burning the fire-clay bricks or blocks. This would causerecesses forming dead-air spaces, which aid toward making said blocks anonconductor of heat, thereby protecting the outside casing andpreventing loss of heat by. radiation. These fire-clay blocks 3 aresecured in the outside casing 1 in such a manner as to leave a slightclearance between the sides of the pocket and the brick to provide forthe expansion when the brick becomes heated. There is also a clearancebetween these bricks or blocks 3 where they project beyond the pockets.(Shown more clearly ,in Fig. 5.)

"This clearance is made of such a size that when the bricks or blocksbecome heated the expansion will not be sufficient to make them pressagainst each other, thereb bulging and cracking the-outide casing. ensawdust or other similar aterial is used to form air cells or recessesin blocks 3, I might on the face of these .blocks'for about two inchesomit such material and make them solid, as the face of these blocks onthe furnace'side would radiate the heat back to the tubes of the boilerbetter than if the blocks contained these air-' cells all the way to thesurface on the furnace side. I do not confine myself to securing theseblocks 3 to the outside casing by the pocket system only, as I mightsecure these blocks 3 to the outside casing by means of the anchor-boltalone or in conjunction with other means. The point that is essential isto have them secured to the casing in such a way as to provide a spacebetween said blocks.

Having described my invention, what I claim as new, and desire to secureby Letters -Patent, is-

1. In a boiler-furnacethecombination of an outer casing with projectionson the furnace side and non-combustible blocks secured to. said casingprotectin the same and ex- I tending over the face 0 said projections toprotect them, said blocks being spaced apart to allow for expansionandcontraction all substantially asset forth.

' 2. In a boiler-furnace the combination of an outer casing rovide'd onthe furnace side roo with pockets, 0 non-combustible blocks se cured insaid pockets, said blocks extending over the edges of said pockets toprotect the same and also being spaced apart to allow for expansion andcontraction.

I 3. In a boiler-furnace, the combination of an outer casing, providedon the furnace side with projectione, of noncombustible blocks- Yorkfand.State of New York, this 26th day secured to sailcll projecsigiis inch amange; of October, A. D. 1903.

as to protectt em sai' o'c eingprovi e with recesses to form inconnection with the ELLIS EDGAR 5 a casing dead-air cells, the blocksbeing spaced .Witnesses:

apart to allow for-expansion and contraction. DAVID GRANT,

Signed at New York, in the county of New C. T. METOALFE.

